3.3.3.1 : MillimilSnapshots

This table contains the dark-matter particles of the milli-Millennium simulation.
Ordered by Snapnum and phKey. This is used in a number of functions that
can query the particles in subvolumes (sphere and boxes) of the simulation volume.

column

type

UCD

unit

description

snapnum

smallint

The identifier of the snapshot for the particle. See the
millimil..snapshots table to find the redshift
and other time variables corresponding to this snapnum.

phkey

int

The Peano-Hilbert key corresponding to the position of this particle. Based on a 323 grid.

x

real

Mpc/h

y

real

Mpc/h

z

real

Mpc/h

vx

real

km/s

vy

real

km/s

vz

real

km/s

id

bigint

The unique identifier of this particle. Allows one to trace the particle in different timesteps
and is also the ID used by the MillimilSnapshotIDs table linking the particle to FOF groups and
Subhalos.